Fourth, the situation of parts and components during equipment assembly has occurred.
When repairing equipment, some parts and components have strict directional requirements; only the correct installation can ensure the normal operation of the parts. Some parts have no obvious tail characteristics, and both the front and the back can be reversed. In actual work, the reverse condition often occurs, resulting in early damage of parts, mechanical failure to work properly, and equipment damage accidents. Such as engine cylinder liner, unequal valve spring, engine piston, piston ring, fan blade, gear pump side plate, skeleton oil seal, thrust washer, thrust bearing, thrust washer, oil retaining ring, fuel pump plunger When the components such as the clutch friction disc hub and the drive shaft universal joint are installed, if you do not understand the structure and installation precautions, it is most easy to install. As a result, the work after assembly is not normal, resulting in equipment failure.
Therefore, maintenance personnel must master the structure and installation direction requirements of the components when assembling the components. Do not blindly install them.
Fifth, the maintenance method is not formal, "governing the standard is not a cure" is still the habit of some maintenance units.
When repairing equipment, some maintenance personnel do not take correct maintenance methods, and believe that emergency measures are omnipotent. There are still many phenomena of “emergency” generation “maintenance” and “treatment of the symptoms without a cure”. As often encountered, "repair by welding" is an example. Some parts can be repaired, but some maintenance personnel have to save trouble, but often use the "weld dead" method; in order to make the diesel generator "powerful", artificially increase the fuel supply of the fuel injection pump and increase the injector fuel injection. pressure.
These irregular maintenance methods can only be used for emergency, but they cannot be used for a long time. The cause of the failure must be fundamentally detected. Regular maintenance methods should be used to eliminate the fault and should be brought to the attention of maintenance personnel.